Measuring apparatus

ABSTRACT

Measuring apparatus, cooperant with a platform having a post extendable vertically upwardly thereof, in the form of a clamping device slideable and rotatable on and relative to the post and including, first, a body sleeved in friction fit relation on the post and, second, a ring vertically spaced from and vertically below the body and sleeved in loose fit relation on the post and, third, a vertically extending yieldable reed connecting between the body and ring and normally spaced outwardly from the post and, fourth, an arm extending radially and outboard of the ring, and a screw means threadedly engaged in the ring diametrically opposite to the reed and in axial alignment with the arm with a manual adjusting of the screw means creating a pulling force on the ring such as to produce a slight deflection downwardly of the ring and arm as the reed pivots with respect to the body.

United States Patent 72] Inventor Edward S. Adamczyk 47 Mazarin St,Indian Orchard, Mass. 01051 [21] Appl. No. 846,060 [22] Filed July30,1969 [45] Patented Aug. 17, 1971 54] MEASURING APPARATUS 3 Claims, 7Drawing Figs.

[52] U.S.Cl.. 33/172 [51] Int. Cl. 60": 3/22, GOlb 5/00,G01b 3/32 [50]FieldolSearch ..33/l69, 172 R, 172 B, I70; 248/124, l25, BIG. 4

[ 56] References Cited UNlTED STATES PATENTS 2,240,536 5/1941 WoxenPrimary ExaminerLeonard Forrnan Assistant Examiner-A. J. MirabitoA!torneys- Kenwood Ross and Chester EL Flavin ABSTRACT: Measuringapparatus, cooperant with a platform having a post extendable verticallyupwardly thereof, in the form of a clamping device slideable androtatable on and relative to the post and including, first, a bodysleeved in friction fit relation on the post and, second, a ringvertically spaced from and vertically below the body and sleeved inloose fit relation on the post and, third, a vertically extendingyieldable reed connecting between the body and ring and normally spacedoutwardly from the post and, fourth, an arm extending radially andoutboard of the ring, and a screw means threadedly engaged in the ringdiametrically opposite to the reed and in axial alignment with the armwith a manual adjusting of the screw means creating a pulling force onthe ring such as to produce a slight deflection downwardly of the ringand arm as the reed pivots with respect to the body.

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MEASURING APPARATUS SUMMARY OF THE INVENTION The invention provides asimple, inexpensive measuring apparatus for usewith an indicating devicefor determining the dimensions of a workpiece or comparing thedimensions of workpieces.

The invention is directed particularly to height gauges or apparatus formeasuring or comparing the measurements of objects and to go and no gogauges for gauging stamped or milled metal parts.

The conventional height gauge, which is an expensive tool and cumbersometo set up and operate, may be a micrometertype gauge or may involve agraduated dial gauge having an operating plunger actuated through alever mechanism that engages the part whose height is to be gauged. Ifthe part being gauged has several different surfaces at differentheights, respectively, from its base, or has several different holes,the height of each of which has to be measured, or whose distance fromone another has to be gauged, several different setups of the heightgauge are required, and the measurement and computation become timeconsuming. Heights may also be gauged with precision measuring blocks,or with such blocks used in conjunction with a surface gauge. None ofthese methods lends itself particularly well to production work.

Herewith, to measure the height of a surface, a microgauge is engagedwith a gauge member and set, and is then swung to engage the surface,whose height is to be measured, to compare the height of that surfacewith the height of the gauge member.

The invention provides a gauge or comparator which may be used forsetting conventional dial gauges quickly and easily so as to gauge theheights of parts in production quantities.

It provides a comparator for use in accurately and quickly settinggauges to measure the heights of a plurality of parts which are,respectively, at different heights.

It provides a comparator which itself requires no checking orcalibration, but which can readily be preset accurately with Johanssonblocks, or similar precision measuring means, so as to be usable quicklyand precisely for setting a conventional gauge to gauge the heights ofvarious parts.

The comparator can be used for repetitive checking of the gauges used ingauging the heights of a plurality of different surfaces that are,respectively, at different heights.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a broken view, in sideelevation, of measuring apparatus embodying the novel features of theinvention and illustrating its use in setting and checking the positionof a standard dial gauge so that the gauge may be used in gaugingheight;

FIG. 2 is a view, in front elevation, of the clamping device of theapparatus of the invention;

FIG. 3 is a view, in rear elevation, of the clamping device of FIG. 2;

FIG. 4 is a fragmentary, cross-sectional view taken on line 4-4 of FIG.1;

FIG. 5 is a view, similar to FIG. 1, showing the relationship of thecomponents in the clamping position;

FIG. 6 is a fragmentary, cross-sectional view taken in line 6-6 ofFlG.5; and

FIG. 7 is an enlarged, fragmentary, cross-sectional view takenlongitudinally through the clamping device and showing the relationshipof the components in the clamping position.

DESCRIPTION OF THE PREFERRED EMBODIMENT A base or platform 10 isprovided which may serve as a support for the apparatus and may alsoserve as a table for supporting objects, such as a workpiece W, forpurposes of mcasurement or comparison.

A column or post or spindle 12 extends vertically upwardly from base 10and is rigidly secured thereto as by being mounted with a press fit inan opening at one side of the base. While the column or post is shown asbeing cylindrical in form, it may be otherwise shaped.

The column or post, which may be of any suitable height, may carry oneor more clamping or positioning means which are slidably and rotatablyand removably mounted thereupon.

' In FIG. 1, and in the other Figures hereof, one such clamping orpositioning means is shown and will be understood to include acylindrical body 14 which is provided with a throughbore 16 of adiameter only slightly larger than the outside diameter of column orpost 12 so as to circumscribe and be freely slidable along and rotatableon the column.

An O-ring 18 may be so seated in a suitable recess within through-bore16 of body 14 adjacent the upper end thereof as to provide a tightinterfit between column and clamping or positioning means.

Body 14 is split vertically by a pair of spaced, parallel slots 20, 20at one side thereof, which slots between them define a longitudinallyextending reed or tongue 22 which merges at 24 into thebody adjacent theupper end thereof.

Further, the body is split horizontally by a slot 30, which slot isarranged circumferentially of the clamping means and is disposedslightly upwardly of the lower end thereof. Slot 30 communicates witheach of the slots 20 and defines an annular, ringlike, lower portion 32which is fixed to the lower end of reed or tongue 22.

The internal diameter 34 of ringlike lower portion 32 is larger than theoutside diameter of column 12 and also larger than the inside diameter16 of body 14.

Tongue 22 is a relativelyyieldable component and acts in a springlikemanner to connect ringlike lower portion 32 to body 14.

At a side of the clamping or positioning means diametrically oppositefrom reed or tongue 22, the stem 39 of horizontally extending thumbscrew40 is threadedly engaged in a provided opening in ringlike lower portion32, the inner end of the stem bearingon column 12 for purposes to bedescribed.

Vertically below tongue 22, an arm 44 projects horizontally outwardlyfrom a boss 45 on lower portion 32 so as to be spaced above and ingenerally parallel relation to base 10.

At the free end of arm 44, an indicating device, generally indicatedly46 is mounted. The indicating device may be any of the severalwell-known and commercially available types commonly used for makingmeasurements and normally includes a dial indicator 48 and a contactmember in the form of a feeler 50 operatively connected to the dialindicator so that movements of the contact member are indicated on thedial indicator, with slight movements being represented by aconsiderable arc of movement of the finger in the dial indicator.

When a dial indicator is associated with arm 44, it is possible tomeasure or compare one object with another object, such as a certainstandard, both of which may be supported on base 10. The lever orcontact member of an indicator, when it is attached to arm 44, is usedto contact the objects.

Clockwise rotation of thumbscrew 40 brings the end of stem 39 intobearing relation with column 12 to lock the clamping means in anydesired position of vertical adjustment relative to the column.

Continued rotation of the thumbscrew draws ringlike lower portion 32 tothe right or in the direction of arrow A in FIG. 7.

Because of the springlike connection afforded by yieldable tongue 22between the clamping means proper and the ringlike portion, as thethumbscrew is tightened the ringlike portion is caused to cant or tilt,with the side of the ringlike portion at the thumbscrew being drawnupwardly in the direction of arrow B in FIG. 7 until the slot 30adjacent the thumbscrew is closed and the ringlike portion contacts thelower end of body 14 and contacts the column at a point diametricallyopagainst the opposite side of the column. Thus, a bearing force isobtained longitudinally of the post for at least the length of thetongue rather than the simple bearing force at the point where stem 39of the thumbscrew bears against the post.

As thumbscrew 40 is tightened, a pivoting action is exerted on tongu e22 so that the ring swings along an are so that arm tongue joined to thebody adjacent the upper end of the body and a horizontally extendingslot in the body defining an annular ring adjacent the lower end of thebody and joined to the lower end of the tongue,

e. screw means threading through the annular ring and bearing on thecolumn for holding the clamping means on the column,

f. an arm extending outwardly from the ring in parallel relation to thebase, whereby appropriate rotation of the screw means motivates the ringalong an are from a pivot point at the junction of the tongue and thebody, with the ring and the arm deflecting downwardly relative to thehorizontal axis of the body. 2. Measuring apparatus according to claim1, wherein the screw means and the arm are axially aligned.

3. Measuring apparatus according to claim 1, including an indicatingdevice on the arm.

1. Measuring apparatus comprising in combination, a. a base, b. a columnextending upwardly from the base, c. a clamping means including a bodyloosely removably circumscribing the column for vertical adjustmentthereon and for angular adjustment about the vertical axis of thecolumn, d. the clamping means including a pair of vertically extendingslots in the body defining therebetween a yieldable tongue joined to thebody adjacent the upper end of the body and a horizontally extendingslot in the body defining an annular ring adjacent the lower end of thebody and joined to the lower end of the tongue, e. screw means threadingthrough the annular ring and bearing on the column for holding theclamping means on the column, f. an arm extending outwardly from thering in parallel relation to the base, whereby appropriate rotation ofthe screw means motivates the ring along an arc from a pivot point atthe junction of the tongue and the body, with the ring and the armdeflecting downwardly relative to the horizontal axis of the body. 2.Measuring apparatus according to claim 1, wherein the screw means andthe arm are axially aligned.
 3. Measuring apparatus according to claim1, including an indicating device on the arm.